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CVE-2026-49825 lxml: javascript: URL bypass in Cleaner via xlink:href

🗓️ 20 Aug 2026 14:42:30Reported by GitHub_MType 
cvelist
 cvelist
🔗 www.cve.org👁 35 Views

lxml prior to 6.1.1 omits xlink:href from link_attrs, enabling javascript: URL bypass in Cleaner for SVG/MathML content.

Related
Affected
Refs
ReporterTitlePublishedViews
Family
almalinux
AlmaLinux
Important: python3.12-lxml security update
9 Sep 202600:00
almalinux
almalinux
AlmaLinux
Important: python-lxml security update
9 Sep 202600:00
almalinux
cbl_mariner
CBLMariner
CVE-2026-49825 affecting package python-lxml for versions less than 4.9.3-3
25 Aug 202623:52
cbl_mariner
cve
CVE
CVE-2026-49825
20 Aug 202614:42
cve
debiancve
Debian CVE
CVE-2026-49825
20 Aug 202614:42
debiancve
oraclelinux
Oracle linux
python-lxml security update
10 Sep 202600:00
oraclelinux
euvd
EUVD
EUVD-2026-63390
20 Aug 202614:42
euvd
github
Github Security Blog
`lxml_html_clean.Cleaner` does not strip `javascript:` URLs from namespaced URL attributes
8 Jul 202620:23
github
nvd
NVD
CVE-2026-49825
20 Aug 202615:17
nvd
opensuse
OPENSUSE Linux
python313-lxml_html_clean-0.4.5-1.1 on GA media (moderate)
7 Jul 202600:00
opensuse
Rows per page
[
  {
    "vendor": "lxml",
    "product": "lxml",
    "versions": [
      {
        "version": "< 6.1.1",
        "status": "affected"
      }
    ]
  },
  {
    "vendor": "fedora-python",
    "product": "lxml_html_clean",
    "versions": [
      {
        "version": "< 0.4.5",
        "status": "affected"
      }
    ]
  }
]

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20 Aug 2026 14:42Current
CVSS 3.18.2
EPSS0.0024
35